[OPENJPA-174] error when find()'ing an abstract class

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.6
• Fix Version/s: 0.9.7
• Environment: Java SE 5; Derby
• Assignee: Unassigned
• Reporter: Jeffrey Blattman
• Created: 19/Mar/07 17:31
• Updated: 09/Mar/10 18:32
• Resolved: 19/Mar/07 21:47

Description

class B extends A
A is abstract
B is concrete

i have persisted an instance of B. now i try:

A a = em.find(A.class, anId);

openjpa fails with:

... Cannot create new application identity instance for abstract class "class A"

if i change the find to:

A a = em.find(B.class, anId);

openjpa works okay.

note that i have two test cases. one is my real model, and one is the simple A and B class example above. my real model fails, where the simple A, B class example works as expected. so, it's is either a side affect of some other issue, or there is something wrong in my model and the error message is misleading or lacking information.